A fifth suspect has been charged after more than £24,000 was swindled from elderly people in the Stevenage area.
Herts police has confirmed Luthfur Rahman, 22 from Camden, was arrested last night.
He has been charged with conspiracy to commit fraud and possession of cannabis with intent to supply.
He was remanded in custody and was due to appear at Hatfield Remand Court this morning.
The arrest relates to a telephone scam in which 23 elderly victims were called by people claiming to be police officers investigating fraudulent activity on their bank accounts, between March and May this year. Some of the victims were then persuaded to withdraw large sums of money and hand it over to couriers who later arrived on their doorsteps.
In total, £24,500 was taken.
Four other suspects were arrested last week and have also been charged with conspiracy to commit fraud.
Anyone who receives a phone call they believe to be suspicious should report it to Herts police on 101.
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